$126+ Cheap flights from Ontario to Boston (ONT - BOS)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOS
Jul 15 — Jul 221
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Boston with Cheapflights
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Cheapest flights from Ontario to BostonExplore the most affordable flight options available from Ontario to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 15, 2026.
Explore the most affordable flight options available from Ontario to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 15, 2026.
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:25 am
ONT
- BOS
1 stop11h 45m
Southwest
Wed 8/262:45 pm
BOS
- ONT
2 stops10h 15m
Southwest
Deal found 6/11![Southwest logo]()
$227
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:50 pm
ONT
- BOS
1 stop7h 15m
Southwest
Mon 9/145:00 pm
BOS
- ONT
1 stop8h 10m
Southwest
Deal found 6/10![Southwest logo]()
$237
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:25 am
ONT
- BOS
1 stop11h 45m
Southwest
Sat 8/295:00 am
BOS
- ONT
1 stop12h 30m
Southwest
Deal found 6/12![Southwest logo]()
$248
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:20 pm
ONT
- BOS
2 stops10h 00m
Southwest
Tue 10/205:15 am
BOS
- ONT
1 stop8h 00m
Southwest
Deal found 6/11![Southwest logo]()
$252
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:59 pm
ONT
- BOS
1 stop7h 25m
American Airlines
Wed 8/266:30 am
BOS
- ONT
1 stop8h 33m
American Airlines
Deal found 6/10![American Airlines logo]()
$253
This Super.com deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:50 pm
ONT
- BOS
1 stop8h 26m
JetBlue
Fri 8/214:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/15![JetBlue logo]()
$255
This Super.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:50 pm
ONT
- BOS
1 stop8h 26m
JetBlue
Thu 8/274:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/11![JetBlue logo]()
$256
This Super.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/311:51 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Wed 8/124:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/11![JetBlue logo]()
$257
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:55 pm
ONT
- BOS
1 stop9h 20m
Southwest
Mon 8/245:40 am
BOS
- ONT
1 stop7h 40m
Southwest
Deal found 6/10![Southwest logo]()
$258
This Super.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1411:50 pm
ONT
- BOS
1 stop11h 32m
JetBlue
Mon 8/244:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/10![JetBlue logo]()
$261
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:55 pm
ONT
- BOS
1 stop7h 00m
Southwest
Sat 8/295:00 am
BOS
- ONT
1 stop12h 30m
Southwest
Deal found 6/11![Southwest logo]()
$263
Best flights from Ontario to BostonDiscover carefully curated flight deals from Ontario to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 15, 2026.
Discover carefully curated flight deals from Ontario to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 15, 2026.
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:55 pm
ONT
- BOS
1 stop7h 00m
Southwest
Sat 8/295:00 am
BOS
- ONT
1 stop12h 30m
Southwest
Deal found 6/11![Southwest logo]()
$263
This JetBlue deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1211:50 pm
ONT
- BOS
1 stop8h 26m
JetBlue
Wed 8/194:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/14![JetBlue logo]()
$296
This Alaska Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:54 pm
ONT
- BOS
1 stop9h 35m
Alaska Airlines
Sun 11/87:10 am
BOS
- ONT
1 stop11h 05m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$427
This Southwest deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2911:55 pm
ONT
- BOS
2 stops9h 45m
Southwest
Tue 10/65:15 am
BOS
- ONT
1 stop8h 00m
Southwest
Deal found 6/13![Southwest logo]()
$332
This Southwest deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2911:55 pm
ONT
- BOS
2 stops9h 45m
Southwest
Wed 10/75:15 am
BOS
- ONT
1 stop8h 00m
Southwest
Deal found 6/13![Southwest logo]()
$332
This JetBlue deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/269:10 pm
ONT
- BOS
1 stop10h 36m
JetBlue
Tue 10/61:00 pm
BOS
- ONT
1 stop10h 13m
JetBlue
Deal found 6/13![JetBlue logo]()
$373
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/411:55 pm
ONT
- BOS
1 stop9h 30m
Southwest
Mon 9/75:40 am
BOS
- ONT
1 stop7h 40m
Southwest
Deal found 6/10![Southwest logo]()
$373
This JetBlue deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/59:10 pm
ONT
- BOS
1 stop10h 36m
JetBlue
Mon 10/124:00 pm
BOS
- ONT
1 stop9h 09m
JetBlue
Deal found 6/14![JetBlue logo]()
$416
This JetBlue deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:10 pm
ONT
- BOS
1 stop7h 47m
JetBlue
Tue 10/61:00 pm
BOS
- ONT
1 stop10h 13m
JetBlue
Deal found 6/14![JetBlue logo]()
$416
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:30 am
ONT
- BOS
2 stops9h 30m
Southwest
Thu 7/306:25 am
BOS
- ONT
1 stop8h 45m
Southwest
Deal found 6/11![Southwest logo]()
$382
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1111:55 pm
ONT
- BOS
1 stop9h 30m
Southwest
Mon 9/212:15 pm
BOS
- ONT
2 stops10h 30m
Southwest
Deal found 6/12![Southwest logo]()
$388
Last-minute flights from Ontario to BostonDiscover last-minute flight deals from Ontario to Boston. Data last updated June 15, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Boston. Data last updated June 15, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:15 pm
ONT
- BOS
1 stop7h 30m
American Airlines
Wed 7/296:00 am
BOS
- ONT
1 stop8h 45m
American Airlines
Deal found 6/13![American Airlines logo]()
$348
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:20 pm
ONT
- BOS
1 stop8h 30m
Southwest
Tue 7/283:45 pm
BOS
- ONT
2 stops10h 05m
Southwest
Deal found 6/14![Southwest logo]()
$353
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/81:11 pm
ONT
- BOS
1 stop7h 03m
American Airlines
Thu 7/307:00 am
BOS
- ONT
1 stop9h 22m
American Airlines
Deal found 6/10![American Airlines logo]()
$352
This JetBlue deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1311:51 pm
ONT
- BOS
1 stop8h 42m
JetBlue
Wed 9/24:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/12![JetBlue logo]()
$296
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/142:50 pm
ONT
- BOS
1 stop7h 00m
Southwest
Tue 7/215:25 am
BOS
- ONT
1 stop9h 40m
Southwest
Deal found 6/11![Southwest logo]()
$327
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/142:50 pm
ONT
- BOS
1 stop7h 00m
Southwest
Tue 7/285:25 am
BOS
- ONT
1 stop9h 40m
Southwest
Deal found 6/14![Southwest logo]()
$358
This JetBlue deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2711:51 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Tue 7/282:45 pm
BOS
- ONT
1 stop10h 50m
JetBlue
Deal found 6/13![JetBlue logo]()
$356
This JetBlue deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2811:51 pm
ONT
- BOS
1 stop11h 31m
JetBlue
Tue 8/42:45 pm
BOS
- ONT
1 stop10h 50m
JetBlue
Deal found 6/12![JetBlue logo]()
$346
This Super.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2811:51 pm
ONT
- BOS
1 stop11h 31m
JetBlue
Mon 8/104:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/11![JetBlue logo]()
$354
This Super.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2811:51 pm
ONT
- BOS
1 stop8h 42m
JetBlue
Wed 8/54:30 pm
BOS
- ONT
1 stop9h 05m
JetBlue
Deal found 6/11![JetBlue logo]()
$355
One-way flights from Ontario to BostonSearch for one-way flight options from Ontario to Boston. Find affordable one-way fares based on user searches. Data last updated June 15, 2026.
Search for one-way flight options from Ontario to Boston. Find affordable one-way fares based on user searches. Data last updated June 15, 2026.
This Super.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2811:51 pm
ONT
- BOS
1 stop8h 42m
JetBlue
Deal found 6/11![JetBlue logo]()
$126
This Super.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/411:51 pm
ONT
- BOS
1 stop8h 42m
JetBlue
Deal found 6/11![JetBlue logo]()
$127
This JetBlue deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2711:51 pm
ONT
- BOS
1 stop8h 35m
JetBlue
Deal found 6/11![JetBlue logo]()
$133
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:00 am
ONT
- BOS
1 stop9h 19m
United Airlines
Deal found 6/10![United Airlines logo]()
$149
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:00 pm
ONT
- BOS
1 stop7h 57m
Delta
Deal found 6/10![Delta logo]()
$150
This Super.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/111:18 pm
ONT
- BOS
1 stop9h 15m
JetBlue
Deal found 6/12![JetBlue logo]()
$159
This Delta deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/47:05 am
ONT
- BOS
1 stop8h 00m
Delta
Deal found 6/14![Delta logo]()
$164
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:10 am
ONT
- BOS
2 stops12h 43m
United Airlines
Deal found 6/12![United Airlines logo]()
$169
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:05 pm
ONT
- BOS
1 stop10h 25m
Delta
Deal found 6/10![Delta logo]()
$170
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/131:50 pm
ONT
- BOS
1 stop8h 21m
United Airlines
Deal found 6/10![United Airlines logo]()
$180
This Alaska Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:05 pm
ONT
- BOS
1 stop9h 04m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$182
Find flight deals from Ontario to Boston
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $227 (Southwest) |
One-way from | $126 (Super.com) |
Popular in | June |
Cheapest in | February |
Average price | $489 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 15, 2026.
Use the filters below to find and compare flights from Ontario to Boston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Mon 8/24
11:55 pm-9:55 am
1 stop7h 00m
Boston Logan Intl
Sat 8/29
5:00 am-2:30 pm
1 stop12h 30m
$263
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 8/12
11:50 pm-11:16 am
1 stop8h 26m
Boston Logan Intl
Wed 8/19
4:30 pm-10:35 pm
1 stop9h 05m
$296
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Tue 9/29
11:55 pm-12:40 pm
2 stops9h 45m
Boston Logan Intl
Tue 10/6
5:15 am-10:15 am
1 stop8h 00m
$332
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Tue 9/29
11:55 pm-12:40 pm
2 stops9h 45m
Boston Logan Intl
Wed 10/7
5:15 am-10:15 am
1 stop8h 00m
$332
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Sat 9/26
9:10 pm-10:46 am
1 stop10h 36m
Boston Logan Intl
Tue 10/6
1:00 pm-8:13 pm
1 stop10h 13m
$373
Quickest round-trip
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Fri 9/4
11:55 pm-12:25 pm
1 stop9h 30m
Boston Logan Intl
Mon 9/7
5:40 am-10:20 am
1 stop7h 40m
$373
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Wed 7/22
5:30 am-6:00 pm
2 stops9h 30m
Boston Logan Intl
Thu 7/30
6:25 am-12:10 pm
1 stop8h 45m
$382
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Fri 9/11
11:55 pm-12:25 pm
1 stop9h 30m
Boston Logan Intl
Mon 9/21
2:15 pm-9:45 pm
2 stops10h 30m
$388
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Mon 10/5
9:10 pm-10:46 am
1 stop10h 36m
Boston Logan Intl
Mon 10/12
4:00 pm-10:09 pm
1 stop9h 09m
$416
OntarioBoston
ONT - BOS
ONTBOS
Ontario
Thu 10/1
9:10 pm-7:57 am
1 stop7h 47m
Boston Logan Intl
Tue 10/6
1:00 pm-8:13 pm
1 stop10h 13m
$416
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Ontario to Boston
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Boston in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Boston flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Boston flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Boston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Boston
Have a flexible travel schedule? Discover the best time to fly to Boston from Ontario with our price prediction graph.
ONT-BOS
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Boston
How far ahead should I book a flight from Ontario to Boston?
Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Ontario to Boston?
Currently, February is the cheapest month in which you can book a flight from Ontario to Boston (average of $331). Flying from Ontario to Boston in June is currently the most expensive (average of $489). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Ontario to Boston?
Reviews of airlines servicing Boston
Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated June 15, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Ontario to Boston by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Ontario to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Boston?
Book flights to Boston if you plan to visit one of these locationsWaltham
Cambridge
Concord
Brockton
Watertown
Hampton Beach
Seekonk
Cranston
Warwick
Peabody
Auburn
York Beach
Chelsea
Londonderry
Dedham
Swansea
Old Orchard Beach
Lowell
Smithfield
Braintree
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes
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Complete your trip
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Alternative routes for Ontario to Boston
See prices for flight routes from nearby airports that may be better suited for you.
Other flights to Boston
Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 15, 2026.
Complete your trip
Complete your trip to Boston by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Boston by cabin class
Find flights from Ontario to Boston, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Boston flights
Browse other Ontario and Boston flight options. Last updated on June 15, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on June 15, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from Ontario to Boston
Discover the top 5 airlines that operate flights from Ontario to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$158 | Average$358 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$223 | Average$333 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$242 | Average$409 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$296 | Average$398 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$302 | Average$433 | FlexibilityNo cancel fee | On-time63% |